Denitrification dephosphorization biological treatment and filtration integral sewage treatment system and method thereof

Abstract

The invention provides a denitrification dephosphorization biological treatment and filtration integral sewage treatment system, which sequentially comprises a reaction tank, an aerobic main aeration tank, an aerobic solid-liquid separation tank and a filtering tank in the sewage flow direction, wherein the aerobic solid-liquid separation tank is provided with a three-phase separator, is respectively connected with the reaction tank and the aerobic main aeration tank through pipelines, and is used for providing back flowing mud. Through the organic combination of the biological treatment and the filtering process, the invention fully utilizes the high-efficient solid-liquid separation capability of the filtering process for ensuring that the biological treatment tank can reach higher mud concentration, the size of the reaction tank can be reduced, and indexes such as suspended substances in outlet water and the like can reach higher standard through filtration.

Description

technical field [0001] The invention relates to a sewage treatment technology, in particular to a sewage treatment system and method integrating biological treatment and filtration for nitrogen and phosphorus removal. Background technique [0002] Biological treatment process is the most widely used treatment process in sewage treatment. This process has high treatment efficiency and stable operation. It is the mainstream process for municipal and industrial sewage treatment. [0003] The concentration of microorganisms in the conventional biological treatment reaction tank is only 2-4g / L, the volume of the structure is relatively large, and the construction investment is high. How to increase the concentration of microorganisms in the biological treatment tank is a main direction to improve the biological treatment process. At present, there are two main ways to increase the concentration of microorganisms in the biological treatment tank. One is to add biological fillers....

AI Technical Summary

Problems solved by technology

The traditional sand filtration technology has the following disadvantages: large area, high investment, high energy consumption, and complicated operation and management; sometimes in order to prevent the growth of algae, the sand filtration system needs to add a pre-chlorination device

[0005] The disc filter of Amber Rodisc and Siemens Disk Filter is a new high-efficiency filter developed in recent years. This type of filter has a small footprint, high filtration speed, and high filtration accuracy, but the disadvantage is the pressure required for backwashing. higher, resulting in higher operating costs

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